package com.etc.cloud.filter;

import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.stereotype.Component;
import org.springframework.util.StringUtils;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

import java.util.Date;

/**
 * @Author kalista
 * @Description
 * @Date 2020/8/24  16:32
 **/
@Component
@Slf4j
public class MyLogGatewayFilter implements GlobalFilter, Ordered {

    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {

        log.info("come in global filter:{}" , new Date());
        ServerHttpRequest request = exchange.getRequest();
        String uname = request.getQueryParams().getFirst("uname");
        if (StringUtils.isEmpty(uname)){
            log.error("用户为null 非法用户");
            exchange.getResponse().setStatusCode(HttpStatus.NOT_ACCEPTABLE);
            return exchange.getResponse().setComplete();
        }

        return chain.filter(exchange);
    }

    /**
     * 过滤器加载的顺序越小。 优先级越高
     * @return
     */
    @Override
    public int getOrder() {
        return 0;
    }

}
